Gehart, Diane R, author
Brooks/Cole Cengage Learning, 2013
Buku Teks
Dibart, Serge, author
Wiley-Blackwell, 2009
Buku Teks
College, 2001
Buku Teks
Margareta Nordin, Vuctor H. Frankel, editors
Wolters Kluwer, 2012
Buku Teks
Okuno, Emico, author
Springer, 2014
Buku Teks